Buffing roll



Aug; 10, 1937.

E. H. VAN VALKENBURGH 2,089,721

' Filed July o, 1935 EH %Mmlay Mama;

' sections of the roll by jamb nuts Patented Aug. 10, 1937 UNITED STATES PATENT OFFICE Application July 10,

3 Claims.

This invention relates to bufi'ing rolls for leather dressing machines and, among other objects, aims to provide an improved laminated buing or abrading roll made in sections and composed of disks glued together and assembled so as to form a perfect cylinder with the laminations in each section arranged at a slight angle to a diameter through the roll to prevent the glue or other hard adhesive substance between the laminations from making marks or scratches on the buffecl material.

Other aims and advantages of the invention will appear in the specification, when considered in connection with the accompanyng drawing, Wherein:

Fig. 1 is a side elevation of a laminated buffing roll embodying the invention;

Fig. 2 is a central longitudinal cross section of the roll;

Fig. 3 is a cross section of the roll; and

Fig. 4 is an enlarged fragmentary view showing the laminations in two adjacent sections.

Referring particularly to the drawing, there is shown a polishing roll or cylinder composed of several cylindrical sections ID each made of laminations or paper straW-board disks ll glued together by suitable adhesive !2. In this instance, the laminations are assembled so that their planes lie at a slight angle to the diameter of the roll, to prevent the glue between them from tracking and making marks on the work. Since the glue is harder than the paper, it does not wear down as fast. These laminations or disks are preferably assembled on wooden rods or pins :3 in a suitable molcl and, after each section is completed, it is trued up on a lathe or other suitable machine. Each section has a central opening !4 which closely fits on an ordinary roll shaft [5 and they are provided with keyways to receive keys 16, as shown in Fig. 3.

Referring to Figs. 1 and 2, the shaft is shown as being of the usual Construction and the roll sections are assembled thereon by means of washers H clamped against the ends of the outer 18 screw threaded on the shaft.

Rolls of this type are especially adapted for use in abrading or bufiing leather, etc. When they are used for polishing or buffing, no abrasive material is applied to the surface. When they are used for abrading, ordinary abrasive material is applied by means of a suitable adhesive. It has been found that the ordinary abrading cylinders or drums made of straight laminations make marks on the work, even though abrasive material is applied to the surface. This is due to the fact that the edges of the paper laminations are much softer than the glue between them. After the roll has been used for a short 1935, Serial No. 30,669

time, it becomes corrugated. With the laminations arranged at a slight angle to the normal so that the glue joints between them overlap during the rotation of the roll, marking or scratching is prevented and the work is made perfectly smooth. The joints between the several sections of which the roll is compcsed, assuming that it is made of sections, are closely tted without any adhesive to avoid making any marks. It will be understood that the edges of the laminations at these joints are feathered due to the angular arrangement of the lamnations. Practical experience has demonstrated that the angularity of the laminations may be varied within fairly wide limits, depending upon the thickness of the disks. Moreover, the sections may be assembled either with the laminations in them parallel or extending in opposite directions.

Obviously, the present invention is not restricted to the particular embodiment thereof herein shown and described.

What is claimed is:

1. A bufilng roll for leather dressing machines and the like comprising, in combination, an elongated cylindrical body made of a plurality of longitudinal sections each composed of a multiplicity of disks of non-abrasive material of substantially the same thickness, the disks in each section being adhesively Secured together with the plane of all of said disks at an angle other than 90 to the axis thereof; and a shaft on which all of said longitudinal sections are secured.

2. A bufiing roll for leather dressing machines and the like comprising, in combination, an elongated cylindrical body having a plurality of longitudinal cylindrical sections each composed of a multiplicity of parallel disks of fibrous material and of substantially the same thickness, all of the disks in each section being adhesively secured together with the planes of the disks at an angle other than 90 to the axis thereof so that the paths of travel of all of the joints between the disks overlap during the rotation of the roll; and a shaft on which said disks are Secured.

3. A buffing roll for leather dressing machines and the like comprising, in combination, an elongated cylindrical body made of a plurality of rigid cylindrical sections each composed of a multiplicity of paper disks of substantially the same thickness, said disks being adhesively Secured together and all of the disks from end to end of each section lying in parallel planes at an angle other than 90 to the axis thereof so that the paths of travel of all of the joints overlap during the rotation of the roll; a shaft on which all of said sections are Secured; and. means on the shat to clamp the several sections together.

EDGAR H. VAN VALKENBURGH. 

